Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755475AbbLQBod (ORCPT ); Wed, 16 Dec 2015 20:44:33 -0500 Received: from szxga02-in.huawei.com ([119.145.14.65]:35724 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752609AbbLQBoc (ORCPT ); Wed, 16 Dec 2015 20:44:32 -0500 From: Wang Nan To: , , CC: , , , Subject: [RESEND PATCH v4 1/3] perf tools: Fix PowerPC native building Date: Thu, 17 Dec 2015 01:43:50 +0000 Message-ID: <1450316632-152513-2-git-send-email-wangnan0@huawei.com> X-Mailer: git-send-email 1.8.3.4 In-Reply-To: <1450316632-152513-1-git-send-email-wangnan0@huawei.com> References: <1450316632-152513-1-git-send-email-wangnan0@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.107.193.248] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020203.5672136A.0020,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 6263f765d9c34712d2985fcdde77ae5c Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2212 Lines: 76 Checks BPF syscall number, turn off libbpf building on platform doesn't correctly support sys_bpf instead of blocking compiling. Reported-by: Naveen N. Rao Acked-by: Jiri Olsa Tested-by: Naveen N. Rao Signed-off-by: Wang Nan Cc: Arnaldo Carvalho de Melo Cc: Sukadev Bhattiprolu --- tools/build/feature/test-bpf.c | 20 +++++++++++++++++++- tools/lib/bpf/bpf.c | 4 ++-- 2 files changed, 21 insertions(+), 3 deletions(-) diff --git a/tools/build/feature/test-bpf.c b/tools/build/feature/test-bpf.c index 062bac8..b389026 100644 --- a/tools/build/feature/test-bpf.c +++ b/tools/build/feature/test-bpf.c @@ -1,9 +1,23 @@ +#include #include +#include + +#ifndef __NR_bpf +# if defined(__i386__) +# define __NR_bpf 357 +# elif defined(__x86_64__) +# define __NR_bpf 321 +# elif defined(__aarch64__) +# define __NR_bpf 280 +# error __NR_bpf not defined. libbpf does not support your arch. +# endif +#endif int main(void) { union bpf_attr attr; + /* Check fields in attr */ attr.prog_type = BPF_PROG_TYPE_KPROBE; attr.insn_cnt = 0; attr.insns = 0; @@ -14,5 +28,9 @@ int main(void) attr.kern_version = 0; attr = attr; - return 0; + /* + * Test existence of __NR_bpf and BPF_PROG_LOAD. + * This call should fail if we run the testcase. + */ + return syscall(__NR_bpf, BPF_PROG_LOAD, attr, sizeof(attr)); } diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 5bdc6ea..1f91cc9 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -14,8 +14,8 @@ #include "bpf.h" /* - * When building perf, unistd.h is override. Define __NR_bpf is - * required to be defined. + * When building perf, unistd.h is overrided. __NR_bpf is + * required to be defined explicitly. */ #ifndef __NR_bpf # if defined(__i386__) -- 1.8.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/